Twenty years ago, MTV held the most epic and iconic VMAs of all time — which included appearances by Nirvana, Pearl Jam, Madonna, Janet Jackson, R.E.M., and Neil Young. So step aside, 2000 VMAs. Just step aside.

Most celebrities consider it an honor to do a voice on The Simpsons, but not everyone is so eager. Here are 32 actors, musicians, and politicians who either turned down a role on the show or were cut from their episode.